Mining-machine-anchoring device



Patented Nov. 13, 1.923.

`NILS D. LEVIN, OF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFACTURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

MININGeMACENE-ANCHORING DEVICE.

Application led September 11, 1918, Serial No. 253,633. Renewed April 11, 1923.

To all whom Muay concern.'

Be it known that I, NILS D. LEVIN, a citi- Y zen of the United States, residing at Cof lumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Mining-Machine-Anchoring Devices, of which the following is a specication, reference being had therein to the accompanying dra-wing.

The present invention relates to certain new and useful improvements in anchoring devices of the class adapted to securely hold a mining machine in working relation with the coal body during the mining operations. In my co-pending application, Seria-l No. 235,632 of even date herewith, I have disclosed a coal mining machine comprising a subbase adapted to rest upon and slide in any direction over the iioor of a mine, a main frame mounted upon said subbase and adapted to rotation about a vertical axis, cutting mechanism extending laterally from said main frame for rotation therewith and adapted to engage the mine wall to form a kerf therein, and feeding devices connected with said main frame and said subbase to cause relative rotation thereof about said vertical axis. As the cutting mechanism engages the mine wall at a considerable distance from the axis of its rotation it acts with great. leverage to Vresist movement of the main frame and thereby produces 4a strong reaction tending to move the subbase upon the mine floor, and powerful anchoringdevices are required to counteract this tendency. In the room andA pillar system of mining, as commonly practiced in the United States. when a room has been fully worked out the mining machine must be transferred to a new working place. This necessity for moving the mining machine along the narrow and tortuous passages of the mine' andv among the roofv supporting timbers in the room, places narrow limits upon its allowable lateral dimensions and, when reliance is placed upon anchoring dovices such as have been heretofore known, great ditiiculty has been experienced in holding the cutting mechanism to its work.

It is the especial object of this invention to provide an anchoring device connected` with the subbase of a mining machine such as is above contemplated, which will completely counteract its tendency to movement relative to the coal body during the cutting operation, and which may be conveniently disposed to permit freedom of movement of the mining machine along the narrow entries and intricate passages of the mine.

The devices by which I attain this object are fully set forth in the following spcication reference being had to the accompany ing drawings of which- Fig. l is a general plan view of a coal mining machine of the type above referred to,`equipped with the devices of my present invention.

Fig. 2 is a section along the line 2 2 of Fig. l.

Fig. 3 is a section along` the line 3-3 of Fig.

Like numerals refer to similar parts in the several figures.

In the drawings I have illustrated a coal mining machine having a subbase l formed of a steel plate adapted to rest upon and slide in any direction over the floor of the mine. Upon the plate l is pivotally mounted a turn table 2 which constitutes the main frame upon which the operative parts of the machine are mounted. Extending out :ardly from the. turn table 2 is a cutting mechanism of the well known type consisting of an cndless chain 3 adapted to travl in guide ways formed upon the forward edge of a vertically disposed loop shaped cutter frame 4:. To the 4cliain 3 are attached renewable cutter bits 5 adapted to engage the coal to cut it. Upon the turn table 2 is also mounted a winding mechanism 6 adapted to wind a feed rope 7 which. is arranged to be attached to a suitable abutment S upon the subbase By the winding of the rope 7 the turn table may be rotated relative tothe subbasc lo cause the cutting mechanism to engage the material of the mine wall to sever sections therefrom. Suitable guide sheaves 9 are provided upon the turn table to guide the rope 'i' in any desired direction. Mounted upon .Y the turn table 2 is a conveyor 10 of well known construction wliich is arranged to receive the material dislodged by the cutting mechanism ico -i ll and to convey itl rearwardly of the machine.

A second conveyer 11 is arranged to receive. the material from the conveyer and deposit 1t 1n a car 12 suitably positioned upon Vthe mine tracks 1 3 in the-rear of the ma- `to a new working place:v In order that lit may be withdrawn from the Worked out room, passing easily between the roof supporting timbers and through the restricted passages ofthe mine, it is imperative that its lateral dimensions shall be narrowly limited. When the cutting mechanism of such a mining mpcnine engages the mine wall further rotation of the turn table will be resisted, and the strain of the feeding mechanism will produce a reaction tending to rotate the subb'ase about the pivot oi` the turn table. 1t has been the practice `heretofore to set jack screws against the subbase and, by pressing their upper ends against the root et the mine, Jtorce the subbase'. against the mine Hoor to prevent its movement relative tothe mine Walls. Owingto its narrowness diiiiculty has been experienced in holdingthe subbase against the leverage ot the cutting mechanism Without recourse to jack screws of prohibitive size and weight, and to avoid this difficulty IV have provided the devices hereinafter set tortlr Attached to the subbase 1 near either ot its lateral edges are hinges 1li to which are connected the arms 15 adapted to extend laterally at either' side of the machine, or to be turned upward upon their respective hinges to positions lying Wholly within the vertical bounding planes of the snbbase. fllach of the arms 15 is composed of .suitable angle bars joined together at their outboard ends by a hinge casting 16. Connected to the hinge casting 16 by a suitable hinge pin 17 is an'upwardly extending socket 18 adapted to receive the foot-oi`- the jack post 19. The jack post 19 may be of any preferred construction. In thedraWi-ngs I have shown, for the purpose of illustration, a jack of the type well known inthe' mining mach-ine art comprising a cylindrical post 2O te Which is screw thread ed the hand Wheel nut 21 adapted to engage the lower end of the tubular extension 22. `When the jack post 19 is in position in the socket 18 the'hand wheel nut 21 may be screvvedupwardly upon the post 2O 'to thrust the tubular extension A22 against the roof ot the mine?, thereby pressing the-arm 15 downwarctly in contact with the Hoer ofthe mine m iframes to securely hold it aga-inst lateral movement in any direction. The hinge connection between the sockets 18 andthe arms 15 affords a iiexibility of connection which materially contributes to the convenience of placing and adjusting the jackpost, and permits the jack to berinclined in a plane tangential to the path otrotatiion oi the end ,of the arm so as to more eil'ectively resist its tendency to 'rotation. then the arms 15 are thus anchored to the floor oi:Y the-mine the snbbase 1 Will be securely held in the desired position, and the distance of the jack'postf-rom the pivotal axis of the turn table affords a leverage sutiicient to insure thek stability ot such anchorage .While permitting the useof jack posts ot convenient size and weight. It it becomesdesirable to move the machine-from one'working place to another, because of the Working outoi' the room, oit-fior any other cause, these anchoring devices may be conveniently disposed to prevent their inter- Yterence 'with the Walls ot the mine or the root supporting timbers by removing the j ack posts 19 from the sockets 18and swinging the arms 15 upon. theirhinges 14ste the upright positions illustrated by the dotted lines in Fig. 2.

What I claim is- 1. The combination `with .a mining niachine comprisinga subbase adapted to rest upon and 'slide over the floor of a hline, a main trame mounted upon1said subbase and adapted to vrotante'v about a vertical axis, cutting mechanism extending laterally from said main -trame. ffor rotation Vvtherewith and adapted `to engage the mine -ivall to form a kert therein, and `feeding devices connected with said main trame and said subbase to cause relative rotation thereof about said vertical axis, ci arms connected with said subbase, and adjustable tro-n1- positions ivithin the vertical bounding planes thereof-to positions laterally remotevtheretrom, and means to hold said arn'is in `orcible `engagement with the mine floor to resist movement of said snbbase relative tothe ininc Walls.

2. The combimition `with a-mining machine comprising a 'subbase adapted to rest upon and slide over the floor of a mine, a matin trame mounted uponsaid subbase and adapted to rotate about a1 vertical axis, cut-tin g mechanism extending laterally'from raid main trame for rotation therewith and adapted to engage the minel wall to form a kerl therein, and feeding 'devices'coir netzteil with said main frame and said Subbase to cause relative rotation thereof about said vertical axis, of arms hinged to said subbaseand adapted to be adjusted from positions Within the vertical bounding planes thereof to positions laterally remote tliereir'ron'i. and means to hold said arms `in `forced engagementwvith the mine 'floor to resistl movement of said subbase relative to the mine walls. A

3. The combinationwith a mining machine comprising a subbase adapted to restv upon and slide over the iioor of a mine, a main frame mounted upon said subbase and adapted to rotate about a vertical axis, cutting mechanism extending late-rally from said main frame for rotation therewith and adapted to engage the mine wall toform a lrerf there-in, and feeding devices connected with said main frame and said chine comprising' a subbase adapted to rest upon and slide over the iioor of a mine, a main frame mounted upon said subbase and adapted to rotate about a vertical axis, cutting mechanism extending laterally from said main frame for rotation therewith and adapted to engage the mine wall to form a korf therein, and feeding devices connected with said main frame and said subbase to cause relative rotation thereof about said vertical axis, of anchoring' devices connected with said subbase adapted to engage the floor of the mine at points outside said subbase and widely separated from: said vertical axis or to be disposed within the bounding planes of said subbase.

5. The combination with a mining niachine comprising subbase adapted to rest upon and slide in any direction over the door of a mine, a main frame mounted upon said subbase and adapted to rotate about a vertical axis, cutting mechanism extending laterally from said main frame for rotation therewith and adapted to engage a mine Wall to form akerf therein` and feeding devices connected with said main frame and said subbase to cause relative rotation thereof about said vertical axis, of anchoring devices permanently connected n ith said subbase adapted to engage the floor of the mine at points outside said subbase and widely separated from said vertical axis or to be disposed withinthe bounding planes of said subbase.

6. The combination 'with a mining niachine comprising a subbase adapted to rest upon and slide over the Hoor of a mine, a main frame mounted upon said snbbase, cutting mechanism carried by said Ina-in frame. and feeding devices arranged to produce movement of said main frame relative to said subbase to cause said cutting mechanism to engage the mine Wall to form a kerf the-rein, of arms hinged to and adapted to extend beyond said subbase, sockets hinged to said arms, and anchor jacks adapted to engage said sockets and the roof of the mine to resist movement of said subbase relative to the mine wall.v

F.The' combination with a mining machine comprising a subbase adapted to rest upon and slide over the floor of a mine, a main frame mounted upon said subbase and adapted to rotate about a vertical axis, cutting mechanism extending laterally from said said main frame for rotation therewith and adapted to engage the mine wall to form a kerf thereinand feeding devices connected with said main frame and said subbase to cause relative rotation thereof about said vertical axis, of anchoring devices iiexibly connected with said subbase adapted to engage the mine iioor at points remote from said subbase or to be disposed entirely within the vertical bounding planes of said subbase.

S. The combination with a mining machine. comprising a subbase adapted to rest upon and slide over the floor of a mine, a main frame mounted upon said subbase, cutting mechanism carried by said main frame, and feeding devices arranged to produce movement of said main frame relative to said subbase to cause said cutting mechanism to engage the mine wall to form a. kerf therein` of arms hinged to and adapted to extend beyond said subbase, or to be disposed within the vertical bounding planes thereof, and means to enga-ge said arms to resist movement of said subbase relative to the mine wall.

9. The combination with a mining machine comprising a subbaseadapted to rest upon and slide ever the floor of a mine, a main frame mounted upon said subbase, cutting mechanism carried by said main frame, and feeding devices arranged to produce movement of said main frame relative to said subbase to cause` said cutting mecha-- nisni to engage the mine wall to form a kerf therein, of arms hinged to and adapted to extend beyond said subba-se or to be folded up to positions within the vertical bounding planes of the subbase, and means to engage said arms to resist movement of said subba se relative to said mine Wall.

l0. in a mining machine ot' the class described the combination of the cutter, the horizontalliT rota-ting cutter carrier, the base. which is stationary when the cutting appa ratus is advancing, the jack engaging with the roof and bearing downward on the Hoor on a vertical line remote from the base, and a bracing holding arm inovably connected to the base and detachably connected at its outer end tothe ack.

1l. In a machine of the class described the combination of the cutting device, the horizontally yrotatable cutter carrier, .the basestationary While the cutter carrier is advancing, the braoing'holder arm movably Connected to the base and adapted to be positioned whilev the operaition at either of sevtionecl at either relatively thereto. y

ln testimony whereof, I aix my signa ture, in presence of two witnesses.

Y NILS D. LEVIN.

orf several inclinations Witnesses:

HARRY C. DEAN, ANNA M. FENLON. 

